gc-decode: Fix test for win64.
gc-decode: Fix test for win64.

AlexIljin/factor,sarvex/factor-lang,factor/factor,dch/factor,slavapestov/factor,factor/factor,sarvex/factor-lang,bjourne/factor,tgunr/factor,factor/factor,factor/factor,slavapestov/factor,slavapestov/factor,mrjbq7/factor,bjourne/factor,nicolas-p/factor,AlexIljin/factor,sarvex/factor-lang,factor/factor,bpollack/factor,nicolas-p/factor,sarvex/factor-lang,nicolas-p/factor,nicolas-p/factor,AlexIljin/factor,bjourne/factor,AlexIljin/factor,bjourne/factor,bpollack/factor,mrjbq7/factor,slavapestov/factor,bpollack/factor,nicolas-p/factor,dch/factor,tgunr/factor,sarvex/factor-lang,slavapestov/factor,bpollack/factor,bpollack/factor,bpollack/factor,mrjbq7/factor,nicolas-p/factor,bpollack/factor,slavapestov/factor,sarvex/factor-lang,factor/factor,AlexIljin/factor,nicolas-p/factor,sarvex/factor-lang,bjourne/factor,mrjbq7/factor,dch/factor,bjourne/factor,mrjbq7/factor,slavapestov/factor,AlexIljin/factor,tgunr/factor,AlexIljin/factor,tgunr/factor,dch/factor,dch/factor,tgunr/factor,bjourne/factor,tgunr/factor,mrjbq7/factor,dch/factor